std/math

Floating-point math and integer limits.

Constants: Pi, E, MaxInt, MinInt

Functions: sqrt, pow, abs, floor, ceil, round, sin, cos, tan, atan2, log, exp, isNaN, inf

Constants

Pi

pub const Pi = 3.141592653589793

π, the ratio of a circle's circumference to its diameter.

E

pub const E = 2.718281828459045

e, the base of natural logarithms.

MaxInt, MinInt

pub const MaxInt = 9223372036854775807
pub const MinInt = -9223372036854775808

The largest and smallest int.

Functions

sqrt

pub fn sqrt(x: f64) -> f64

The square root; NaN for negative numbers.

pow

pub fn pow(x: f64, y: f64) -> f64

x to the power y.

abs

pub fn abs(x: f64) -> f64

The absolute value.

floor, ceil, round

pub fn floor(x: f64) -> f64
pub fn ceil(x: f64) -> f64
pub fn round(x: f64) -> f64

Rounds down, up, and to the nearest integer (halves away from zero).

sin, cos, tan

pub fn sin(x: f64) -> f64
pub fn cos(x: f64) -> f64
pub fn tan(x: f64) -> f64

Trigonometric functions, in radians.

atan2

pub fn atan2(y: f64, x: f64) -> f64

The angle of the point (x, y) from the x axis, in (-π, π].

log, exp

pub fn log(x: f64) -> f64
pub fn exp(x: f64) -> f64

The natural logarithm, and e to the power x.

isNaN

pub fn isNaN(x: f64) -> bool

Whether x is not a number (the result of 0.0 / 0.0, sqrt(-1.0)).

inf

pub fn inf() -> f64

Positive infinity.